I want to choose some commercially manufactured biochars as soil amendment to immobilized heavy metal. The biochars are already characterized. I want to know what features are important to be considered in choosing the biochars.
I'm unable to give you the exact answer of your question. According to my knowledge and experience, biochar response against heavy metal immobilization is highly influenced by soil pH, temperature and another cations and anions.
Firstly you need to identify the heavy metals present in soil. Because, according to literature's each biochars are not performing the same for every heavy metals. According to your use you need to select the biochar.
In the case of biochar you need to consider the surface area, stability of biochar and surface chemistry of biochar play an very important role for immobilizing the heavy metals in soil.
Regards
Sandeep Kumar
@Kumar, thanks for your contribution. I understand there are several characteristics that are important. But in reality, all these good characteristics cannot be found in single biochar type. So, I prefer to make do with some important characteristics of great priorities in choosing the biochar.
Regards
Dear Clement,
We include a decision tree in our paper.
Important factors are cation exchange capacity, pH, and O/C ratio
Tom
Article A review of biochars’ potential role in the remediation, rev...
I used a broiler litter biochar for removing radioactive Cs form water and published the results. pH of the solution and probably pH of the char it self is important.
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